Internal-combustion engine.



FLA. BLUME.

INTERNAL COMBUSTION ENGLNE. APPLICATION FILED JULY 28.1914.v

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H. A. BLUME.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED IuLY 28.19I4.

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ROBERT A. BLUME, OF SEATTLE, WASHINGTON, ASSIG-NOR TO VALVEIESS ENGINE CORPORATION, 0F SEATTLE, WASHINGTON, A CORPORATION OF WZASI-IIINGrTON.y

INTERNAL-COMBUSTION ENGINE.

aisance.

Specication of Letters Patent.

i Pate-tilted Sept. 21. 1915.

t Application led July 28, 1914. Serial No. 853,574.

' Be it known .that I, ROBERT A. BLUME, citizen of the United States, residing at Seattle, in the county of King and State of Vashington, have invented a certain new and useful Improvement in lInternal-Gombustion Engines,`of which the following is a speciiication.

My invention relates to improvements irr rotary engines of the internal combustion type in which a plurality of cylinders are secured to a crank case and adapted to re volve around a fixed shaft, and the object of my improvement is to provide adapted to run at a high speed with a minimum amount of vibration, and whichzshall embody eliicient means for introducing successive charges of explosive mixture into each cylinder of such engine at proper instants of time. I accomplish this object devices illustrated in the vaccompanying drawings in whichv Figure 1 is a. view in end elevation of an engine embodying my Yinvention certain parts .being shown in cross-section for the purpose of more clearly illustrating the same; Fig. 2 is a view in cross-section on broken line A, A of Fig. 1, certain parts. being shown in elevation, andV Fig. 3 is a view in cross-section of a detailfof my invention.

Referring to the drawings, throughout which like reference numerals indicate like parts, 5 is a hexagonally shaped crank case and 6 is a crank shaft that may be fixedly secured to any rigid support (not shown) and may extend through the crank case 5 as more clearly shown in Fig. 2. Secured upon alternate faces of the hexagonally shaped crank case 5 are engine cylinders 7 and disposed betweeneach of adjacent ones oi' said engine cylinders 7 is a pump cylinderv 8, the pump cylinders 8 being arranged in 'a'plane slightly to one side of the planein which the engine cylin-` ders 7 are arranged, as more clearly shown in Fig. 2, whereby they may more easily be connected with 'the crank shaft 6.

The .engine cylinders 7 and pump cylinders' 8 are provided respectively with base flanges 9 and 10 by which such cylinders 7 and 8 may ends 12 and 13 of the crank case/5,'the bolts 11 serving to bind the crank case 5, the ends 12 and 13 and the cylinders 7 and 8 toa-n engine be bolted by bolts 11 to the lgethe'r. The ends 12 and 13 are provided with bearing boxes 11 and 15 through lswhiclb thev shaft 6 may extend.

The shaft 6 is provided with a crank pin `16 to which aresecured connecting rods 17 that extend to, and are connected by, wrist pms 18 with pistons 19 in the engine cylinders 7 and such shaft 6 is further provided at a polnt near the crank pin 16 with another crank pin 20 that is disposed in a different radial plane and which is adapted to have secured thereto connecting rods 21 that are articulated by wrist pins 22 with pis- .tons 23 that are disposed in the pump cylinde'rs 8. The connection between the con-v necting rods 17 and the crank pin' 16 is formed' by permitting the inner flanged` ends 2li of such connecting rods 17 to rest upon a bushing 25 .that surrounds the crank pin 16 and by securing such hanged ends 24:

in their proper position by rings 26 and 27 that slip over the flanges on such ends 24 and are secured by bolts 28, las more clearly shown in Fig. 2, the connection between the crank pin 20 and the connecting rods 22 be' ing formed in a similar manner by securing the inner ianged ends of the connecting ends 22 to the crank pin 2() by rings 29 and 30 that are secured together by bolts 31'.

The engine cylinders 7 are each provided with exhaustports 32 and with inlet ports 33 which inlet ports are connected with the pump cylinders 8 bypassageways 34 whereby 'explosive mixtures may pass -from the pump cylinders 8 into the engine cylinders 7, and such pump cylinders 8 are each connected by ports 35 and passageways 36 with an annular gas chamber 37 which isconnected by a passageway 3 8 with a carbureter 39 of any ordi ary form, within which carbureter .39 a ii gas and air for the cylinders 7, may be produced.

The, pistons 19 are provided on their top ends with deiectors 40, more clearly shown in- Fig. 1, and the engine cylinders 7 are each provided near their top ends. with a spark plug 41 which may be adapted by any well known timing means to deliver a `sparkf into its cylinder' at proper instants of time to cause an explosion of gases Whose expansion serves to operate the engine.

The pistons 23 in each of the pump cylin dersare hollow, as shown in Fig. l, and are each formed witha diagonallye'xtending soA roper explosive mixture of pist-on 23 to flow outwardly into the then expartition 42 that divides such piston into two partsto guide the flow of gases therein, the pistons 23 each being provided near its inner end with aV port 43 that is adapted when such piston 23 is at the outermost position in its stroke, as shown in Fig. l, to register with a port 44 in the side of the cylinder. 8, which communicates with the passageway 34, whereby gases may How from the space above the wall 42 of the piston 22 into the space above the piston 19 in the cylinder 7. n

A member 45, which forms the outer wall of the annular gas chamber 37, is secured to the end 13 of the crank case and the outer end of such member 45 is adapted snugly to it over and turn upon an annular bearing surface 46`,p1ovided on the inner end of a member 47 within which is formed the passageway 38 that leads to the carbureter thus forming a tight bearing through which air may not pass, the member 45 rotating and the member 47 remaining lixed.

The operation of my engine may be described as follows: The various parts are assembled, as shown in Figs. l and 2, and the shaft 6 is secured to any suitable support as to the frame of a machine, the carbureter 39being' connected with a suitable supply of gasolene; the cylinders and crank case are then turned over by any suitable means, as by hand, until a charge of vgas from the carbureter is drawn Ainto one of thecylinders 7 and is ignited at the point of high compression by a spark from a spark plug 4lv to explode within the cylinder, thus to revolve the cylinders together with the crank case about the crank shaft 6 in a well known manner, explosions following-in proper succession in the other cylinders. In the en gine, as shown in Fig. l, when a pump cylinder 8 is in a position substantially opposite to the position of the cylinders 8 shown in cross-section, the piston 23 will be withdrawn to the innermost limito its stroke, as shown in Fig. 3, and will cause a charge of explosive' mixture from the carbureter 39 to be drawn into such cylinder above the piston 23. As the revolution of the crank case continues in a clockwise direction the piston 23will move upwardly A until it reaches the position shown in cross7section in Fig. V1, and until the port 43 registers with the port 44, to permit the charge ot' compressed explosive mixture above the hausting engine cylinder 7,1'the exhaust ports of which cylinder 7 are'adapted to be closed at the proper point wlien such cylinder has been properly scavenged of burned gases and before any of the fresh lcharge has passed outwardly therethrough'. crank case and cylinders move around in a clockwise direction from the position shown in Fig. l, the piston 19 in the cylinder' 7,

As the shown in cross-section, moves upwardly and compressesthe charge in the cylinder 7 and when suoli cylinder 7 has reached a point in its revolution approximately opposite to the point vshown in Fig. l, a suitably timed spark is produced in such cylinder by the spark plug 4l to explode the charge therein to cause the pressure of expanding gases to do work to revolve the cylinder during the remainder of the revolution of such cylinder.

A belt pulley 48 may be secured to the end plate l2 and may be connected by a belt 49 with any suitable device to which power is to be communicated.

Obviously any desired number of cylinders may be provided on an engine constructed in accordance with my invention and numerous other changes may be made without departing from the spirit of my in- -Vention or sacricing any of-its advantages.

What I claim is:

1. In an engine of the class described, the I combination with a crank case, of a plurality of engine cylinders secured tosaid crank case, pump cylinders each secured to said crank case in a position between adjacent ones of said engine cylinders, oppositely disposed inletand exhaust vports in the engine and pump cylinders, passageways connecting the exhaust ports of the pump cylinders i to the inlet ports of the engine cylinders, a carburetor connected with said crank case by suitable means to form a gas chamber, pipes connecting said pump cylinders with said gas chamber whereby gas may be drawn into said pump cylinder inlet ports, pistons provided in said engine cylinders, a xed crank shaft, and connecting rods articulating said pistons with said crank shaft whereby explosions within said cylinders may operate to move said pistons to rotate said crank case together with said cylinders.

2. ln an engine of the class described, the combination with a rotatably mounted crank case, of a plurality of engine cylinders secured to said crank case, 'pistons provided in said engine cylinders, pump cylinders each secured to said crank case between adjacent ones of said engine cylinders, each of said pump cylinders being connected with a source of supply of explosive gas, pistons provided in said pump cylinders, oppositely disposed inlet and exhaust ports in the engine. and pump cylinders, passageways connecting the exhaust ports of the pump cylinders to the' inlet ports of the engine cylinders,'arad a fixed 4crank shaft provided in said crank case Vand connected with all of V said pistons whereby said crank case and vsaid cylinders maybe rotated masses of said cylinders, a fixed crank shaft, connecting rods extending between said ciank vways connecting the exhaust ports ofl the pump cylinders to the inlet ports of the engine cylinders. i

4. In an engine of the class described, the

` combination with a rotatable crank case, of

a xed crank shaft disposed to extend through said crank case, a plurality of engine cylinders secured to said crank case', a

plurality of pump cylinders each secured to .said crank case between adjacent ones of said engine cylinders, pistons provided in said engine cylinders and in said pump cylinders, connecting rods disposed to connect each of said pistons with said crank shaft, a carbureter, communicating means connecting said carbureter with said crank case and forming a gas chamber, pipes con necting said pump cylinders and said gas chamber, oppositely-disposed inlet and exhaust ports in the engine and pump cylinders, and ,passageways connecting the exhaust ports ofthe pump cylinders to the inlet ports of the engine cylinder.

5. In an engine of the class described, the

combination of a crank case having a plu-V rality of engine cylinders and a plurality of pump cylinders secured thereto said pump cylinders each being provided with ports that are connected with a source of supply of explosive gases and with ex? haust ports, oppositely-disposed inlet and exhaust ports in the engine cylinders, pas sageways between `the engine cylinder inlet ports and the pump cylinder exhaust ports, pistons disposed 'to reciprocate in each of said pump cylinders each of said pistons being provided with a port near its lower end and being fui-ther provided with an angularly disposed partition whereby a charge of explosive gases may be admitted above the top of said piston when it is Withdrawn toward the center of said crank case and which gases may be discharged through said v'port, into one of said engine cylinders through the'passageways when said piston `is at the limit of its outward movement, a

.D f s 'fixed -crank shaft, and connecting rods arn ticulating said pistons and said crank shaft.

6. An engine of the class described, em-

bodying a'crank case having a plurality ot' engine cylinders anda plurality of pump cylinders secured thereto, and hollow pistons disposed in each of said pump cylinders adapted to be reciprocated therein, an inlet and outlet port in each pump cylinder, a

diagonally disposed partition in each pump the opposite side thereof, andeac'h pump cylinder piston being further provided w-ith a port extending through its wall at the outer end into the space on the compression side of said partition.

7. In an engine of the class described, the combination with a crank case having a plurality of pump cylinders and engine cylinders secured thereto, of ports provided in said cylinders, means connecting each of said pump cylinders with one of said engine cylinders, means connecting veach of said pump cylinders with a source of supply of explosive gases, pistons disposed to reciprocate in said cylinders, leach of the pistons in said pump cylinders being provided with a diagonal partition extending from the inner end thereof to the opposite outer end and with a port adjacent to the lower end of said di agonal partition leading from the compression side thereof, whereby a charge of explosive gases may be admitted to said pump cylinder above the top of said piston when said piston is at the limit of its inward movement and which gases may be discharged through said port when said piston is at the limit of its outward movement.

8. An internal combustion engine einbodying fluid compressing cylinders provided with ports, a hollow piston disposed in each of said cylinders adapted to be reciprocated therein, each of said pistons being provided with a diagonally disposed partition extending from one side of its compression end to the opposite side of its other end to divide the hollow space therein into substantially equal compartments and each being further provided with a port extending throughits wall at the other end from the space on the compression of such partition'. n

9. in an engine of the class described. a plurality of comii'iunicating engine and puiiip cylinders. a piston iii each cylinder, the pump cylinder pistons being hollow `and having a compound curved partition wall extending from the inner end of the piston to the olfiposite'outer end thereof, oppositelydisposed inlet and exhaust ports in each cylinder, and an outlet port in the pump cylinderpiston on the compression side adjacent the inner end thereof.

n witness whereof,.I hereunto subscribe. 

